WO2005046017A1 - Dispositif de protection contre la surchauffe et systeme electrique pourvu de ce dispositif - Google Patents

Dispositif de protection contre la surchauffe et systeme electrique pourvu de ce dispositif Download PDF

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Publication number
WO2005046017A1
WO2005046017A1 PCT/JP2004/016257 JP2004016257W WO2005046017A1 WO 2005046017 A1 WO2005046017 A1 WO 2005046017A1 JP 2004016257 W JP2004016257 W JP 2004016257W WO 2005046017 A1 WO2005046017 A1 WO 2005046017A1
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WO
WIPO (PCT)
Prior art keywords
secondary battery
variable resistance
prevention device
overheat prevention
electric
Prior art date
Application number
PCT/JP2004/016257
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Hasunuma
Takashi Sato
Original Assignee
Tyco Electronics Raychem K.K.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics Raychem K.K. filed Critical Tyco Electronics Raychem K.K.
Priority to EP04799460A priority Critical patent/EP1681753B1/fr
Priority to JP2005515293A priority patent/JPWO2005046017A1/ja
Priority to US10/578,380 priority patent/US8174811B2/en
Priority to KR1020067011121A priority patent/KR101163797B1/ko
Priority to CN2004800328218A priority patent/CN1879274B/zh
Publication of WO2005046017A1 publication Critical patent/WO2005046017A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an overheating prevention device for preventing overheating of an electric device, for example, a secondary battery, and more particularly, to an overheating prevention device using a variable resistance element such as a PTC element whose resistance changes according to temperature. About the device. Furthermore, the present invention relates to an electric device provided with such an overheat prevention device.
  • the "PTC element” refers to a thermistor having a positive temperature coefficient (Positive Temperature Coefficient), as is known in the field of electric and electronic circuit technology.
  • a temperature coefficient Positive Temperature Coefficient
  • the electric resistance sharply increases.
  • the former state of the PTC element is also referred to as a low state, and the latter state is referred to as a high state.
  • Such temperature-dependent electrical characteristics (or resistance change) of PTC devices are irreversible.
  • Fig. 4 shows a block diagram of a conventional electric circuit in which such a PTC element for preventing overheating is incorporated.
  • a conventional electric circuit 60 a secondary battery 61 incorporated in an electronic Z electric device (not shown) is electrically connected to an ablation circuit 63 via terminals 67a and 67b.
  • a PTC element 65 is inserted in series between the secondary battery 61 and the application circuit 63.
  • Such a PTC element 65 is disposed in close contact with the secondary battery 61 inside the electronic Z electrical device so that an abnormal temperature of the secondary battery 61 can be detected.
  • the temperature of the secondary battery 61 is reduced by heat generated by a discharge reaction in the secondary battery 61. Can rise. As the temperature of the secondary battery 61 rises, the temperature of the PTC element 65 also rises However, under normal conditions, the PTC element 65 is below the trip temperature and is in a low state. At this time, since the resistance value of the PTC element 65 is sufficiently low, the discharge of the secondary battery 61 is not substantially affected.
  • the PTC element 65 In addition to the overheating of the secondary battery 61 as described above, the PTC element 65 also has a function of preventing overcurrent.
  • the PTC element 65 In a normal current state in which no overcurrent occurs, the PTC element 65 is in the Low state, and does not substantially affect the discharge of the secondary battery 61. However, when the current flowing through the electric circuit 60 becomes excessive, Joule heat is remarkably generated in the PTC element 65. Eventually, when the temperature of the PTC element 65 exceeds the trip temperature, the low state force also transitions to the high state, and the electrical resistance of the PTC element 65 rapidly increases, and the current flowing through the secondary battery is significantly limited. As a result, the PTC element 65 detects an abnormality in the current flowing through the secondary battery 61 and prevents overcurrent.
  • the PTC element has reversible temperature-dependent electrical characteristics (resistance change), and thus can be used repeatedly (or resettable). Therefore, if the PTC element is used to prevent overheating of the secondary battery, there is an advantage that it is not necessary to replace the element every time it is used like a fuse.
  • Patent Document 1 JP 2001-102039 A
  • Patent Document 2 Japanese Translation of PCT International Publication No. 2002-528874
  • the present invention has been made to solve the above-described conventional problems, and an object of the present invention is to effectively prevent overheating of an electric device such as a secondary battery.
  • An object of the present invention is to provide a new overheat prevention device and an electric device including the same.
  • an overheat prevention device including a variable resistance element whose resistance changes in accordance with temperature, for example, a PTC element, which flows into an electric device (including an electronic device).
  • a variable resistance element that is thermally coupled to a predetermined location of the electrical device, and is connected to the switching element when the predetermined location is in a high temperature state.
  • a novel overheat prevention device is provided, which is capable of interrupting a current flowing through an electric device by changing an applied voltage.
  • the overheat prevention device of the present invention uses the variable resistance element and the switching element in an appropriate combination.
  • the variable resistor detects abnormal temperature, and when the abnormal temperature is detected, the variable resistor changes the voltage applied to the switching element, thereby interrupting the current flowing to the electric device. Can be controlled to be turned off. Therefore, the variable resistance element itself does not limit the current flowing to the electric device, and the variable resistance element does not need to be connected in series to the electric device. Therefore, according to the overheating prevention device of the present invention, while maintaining the power efficiency of the electric device at a negligible level, the abnormal temperature of the electric device (particularly, local temperature abnormality) is quickly detected and the overheating is detected. Can be effectively prevented.
  • the overheat prevention device of the present invention can use a variable resistance element that occupies a smaller space without having to use a variable resistance element having an extremely low resistance in a normal temperature state, so that the mounting space is limited. It is convenient to apply to the electrical device.
  • variable resistance element in an electric device including a secondary battery, is disposed so as to be thermally coupled to the secondary battery.
  • the electric device including such a secondary battery may be in the form of a so-called battery pack, for example.
  • variable resistance element whose resistance changes according to temperature refers to an element whose electric resistance changes depending on the temperature environment to which the element is exposed.
  • the variable resistance element is, for example, a PTC element, and is preferably a polymer PTC element. PTC element is electric
  • Polymer-A PTC element is also called a PPTC element or PolySwitch TM.
  • a polymer PTC element has a structure in which a polymer layer in which a conductive filler is dispersed is sandwiched between two metal electrode foils.
  • the phrase "the variable resistance element is arranged thermally coupled to the object and the Z or the target location” means that the variable resistance element is exposed to the temperature environment of the target location of the target Z. Say that. For example, it means that the variable resistive element is at least partially in contact with the object Z target position, and is preferably disposed in close contact therewith.
  • the resistance of the variable resistance element can be changed depending on the temperature at the predetermined position. In addition, it is possible to detect an abnormal temperature at the predetermined location.
  • the predetermined location becomes a high temperature state due to overheating, and when the PTC element is heated to a trip temperature or higher, the PTC element becomes a high state and its resistance increases rapidly.
  • At least one variable resistance element may be used, but it is preferable to use a plurality of variable resistance elements electrically connected in series.
  • the plurality of variable resistance elements may be formed separately, in which case the plurality of variable resistance elements may be thermally coupled to any of various locations of an electrical device (eg, a secondary battery) and arranged. .
  • some or all of the plurality of variable resistance elements may be integrally formed (for example, see Patent Document 2).
  • the temperature abnormality can be detected more quickly than when using a single variable resistance element. can do. It should be noted that those skilled in the art who do not need to electrically connect all of the plurality of variable resistance elements in series can appropriately modify the arrangement according to the arrangement of the variable resistance elements.
  • variable resistance elements are particularly likely to be overheated and may be arranged at locations! However, when a plurality of variable resistance elements are used, they may be evenly arranged on the surface of the electric device. It is preferable to arrange at least one variable resistance element on the surface at a rate of 10 cm 2 .
  • the "switching element” that controls the current according to the applied voltage refers to controlling the ONZO FF of the current flowing through the electric device depending on the voltage applied to the switching element.
  • An element that can be used a state in which the current flowing through the electric device is not substantially limited by the switching element is simply referred to as “ON”, and the current that should flow through the electric device is switched on.
  • the state in which the electric current is substantially prevented from flowing through the electric device by being interrupted by the tuning element is simply referred to as “OF FJ.
  • the switching element is a field-effect transistor (Field-Effect).
  • FET field-effect transistor
  • MOSFET Metal-oxide-semiconductor
  • the overheat prevention device further includes a resistor, the variable resistance element and the resistor are electrically connected in series with each other and in parallel with an electric device, and the switching element is connected in parallel with the resistor. Is electrically connected to According to such a configuration, the object of the present invention can be achieved with an extremely simple configuration that does not require a complicated control circuit.
  • the gate of the FET is electrically connected between the variable resistance element and one end of the resistor, and the source of the FET is electrically connected to the other end of the resistor. Then, the source and the drain of the FET are electrically connected so as to form a part of an electric circuit including the electric device.
  • the voltage between the gate and the source of the FET is higher than the threshold, a current flows between the source and the drain, so that the current flows to the electric device (ON), and when the voltage between the gate and the source becomes lower than the threshold.
  • the current flowing to the electric device can be cut off (OFF).
  • V GS ⁇ V 0
  • V is the voltage between the gate and source
  • V is the voltage across the variable resistance element and the resistor
  • P is the voltage across the variable resistance element and the resistor
  • the resistance P in Equation (1) is the resistance of the variable resistance element itself, and n (n is a natural number) variable resistance elements are electrically connected in series.
  • n a natural number
  • the resistor is a well-known resistor and is generally a fixed resistor.
  • the resistance of a fixed resistor can be considered to be substantially constant, albeit with some temperature dependence.
  • the resistance ⁇ of the variable resistance element changes depending on the temperature, more specifically, the temperature of a portion thermally coupled to an electric device (eg, a secondary battery).
  • variable resistance element at least one of the variable resistance elements is used
  • the gate-source voltage V is set to be equal to or lower than the predetermined threshold voltage V.
  • the relationship between the resistance P of the variable resistance element and the resistance scale of the resistor is expressed as RZP> IO
  • the overheat prevention device of the present invention further includes another variable resistance element whose resistance changes according to temperature, for example, a PTC element, for preventing an overcurrent of the electric device.
  • the variable resistance element for preventing overcurrent is electrically connected in series to an electric circuit including an electric device, unlike the variable resistance element for detecting an abnormal temperature as described above.
  • the secondary battery (or cell) that can be used in combination with the overheat prevention device of the present invention is, for example, a nickel-metal hydride secondary battery, a double-powered secondary battery, a lithium ion secondary battery. Batteries, lithium manganese rechargeable batteries, lithium polymer rechargeable batteries, and various other rechargeable batteries!
  • the overheat prevention device of the present invention can be used to prevent overheating of a secondary battery built in portable equipment such as a mobile phone, a personal digital assistant (PDA), a notebook computer, a digital camera, and a digital movie. Can be used for However, the overheat prevention device of the present invention is not limited to this, and is portable or movable (or In various electrical devices (which may be subject to space restrictions), it could be used to prevent overheating of various electrical electronic components.
  • an electric apparatus including the overheat prevention device of the present invention as described above.
  • an electric device includes a secondary battery electrically connected to an electric element to form an electric circuit, and an overheat prevention device is electrically connected between the secondary battery and the element in parallel.
  • the electric element includes, for example, a load such as various application circuits that operate using the secondary battery as a power supply, or an external power supply such as a charger for charging the secondary battery.
  • a load such as various application circuits that operate using the secondary battery as a power supply, or an external power supply such as a charger for charging the secondary battery.
  • Such an electrical device may be a portable device as exemplified above.
  • the electric device of the present invention is not limited to this, and may be an electric device including various components in addition to or instead of the secondary battery.
  • a novel overheat prevention device capable of interrupting a current flowing through an electric device depending on the temperature of the electric device including, for example, a secondary battery and effectively preventing overheating of the electric device. And an electric device including the same.
  • a variable resistance element such as a PTC element Since the temperature abnormality is detected by the control device and the current flowing to the electric device through the switching element is controlled, the decrease in the power efficiency of the electric device can be reduced to a negligible level.
  • variable resistance elements in the case where a plurality of variable resistance elements are used in the present invention, a plurality of variable resistance elements can be attached to various places of the electric device, and therefore, compared with the case where one variable resistance element is used, The temperature abnormality of the electric device can be detected more quickly, and the occurrence of the local temperature abnormality can be appropriately dealt with.
  • FIG. 1 is a block diagram of an electric circuit incorporating an overheat prevention device according to one embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a use state of the overheat prevention device in the embodiment of FIG. 1, FIG. 2 is a perspective view of a secondary battery to which a PTC element for detecting a temperature abnormality is attached.
  • FIG. 3 is a block diagram of an electric circuit showing a modification of the embodiment of FIG. 1.
  • FIG. 4 is a block diagram of a conventional electric circuit incorporating a PTC element for preventing overheating. Explanation of symbols
  • FIG. 1 is a block diagram of an electric circuit 10 including a secondary battery in which the overheat prevention device 20 of the present embodiment is incorporated.
  • a secondary battery 1 is electrically connected to an application circuit (electrical element) 3 and wiring 19 via terminals 7a and 7b to form an electric circuit 10.
  • an overheat prevention device 20 (portion surrounded by a dotted line in the figure) is electrically connected in parallel between the secondary battery 1 and the application circuit 3 and incorporated.
  • the electric device (not shown) in the present embodiment is a portion including the secondary battery 1 on the left side of the terminals 7a and 7b and the overheat prevention device 20, and corresponds to a so-called battery pack.
  • the application circuit 3 may be detachable from this electrical device via terminals 7a and 7b.
  • n PTC elements 11 and resistors 13 are connected in series.
  • the force in which the resistor 13 and the FET 15 are connected in parallel, One HG) is electrically connected between the PTC element 11 and one end of the resistor 13, and the source (S) of the FET 15 is electrically connected to the other end of the resistor 13.
  • the drain (D) of the FET 15 is electrically connected to the application circuit 3 via an optional PTC element 17 described later, and the source (S) and the drain (D) are connected to the secondary battery 1 and the application circuit 3. It is arranged so as to constitute a part of an electric circuit including:
  • Each of the n PTC elements 11 is for detecting a temperature abnormality of the secondary battery 1, and may be disposed in close contact with the upper surface of the secondary battery 1 as shown in FIG. 2, for example. Instead, they may be arranged on the side surface and the lower surface. In FIG. 2, positions a and b of the wiring 19 correspond to positions a and b shown in the block diagram of FIG. 1, respectively. Although four PTC elements 11 are shown in FIG. 2 by way of example, fewer or more PTC elements 11 may be used.
  • the secondary battery 1 for example, a two-way Doniary battery, a nickel hydride secondary battery, a lithium ion secondary battery, or the like can be used.
  • the voltage V across the secondary battery 1 is not particularly limited, but may be, for example, about 0.8-3.2V. Any suitable application circuit or load can be used for the application circuit 3 electrically connected to such a secondary battery 1.
  • a PTC element having appropriate electric characteristics such that a reference temperature for determining whether the secondary battery 1 is in an overheated state corresponds to the trip temperature.
  • the trip temperature of the PTC element 11 can be about 70 to 120 ° C.
  • the resistance value is about 10 ⁇ -lk Q
  • the PTC element 11 is in the high state (typically, The resistance value when the element temperature is about 100 ° C) can be about 100 ⁇ to 10k ⁇ .
  • the number (n) of the PTC elements 11 can be used according to a desired temperature detection point of the secondary battery 1.
  • PTC elements 11 When a plurality of PTC elements 11 are used (that is, when n is 2 or more), all or some of them may have the same electric property or different electric properties. These PTC The elements are preferably arranged as uniformly as possible on the entire surface of the secondary battery, for example, at least one element per 10 cm 2 . The number of PTC elements 11 depends on the total surface area of the electrical device, but is generally two to about ten.
  • resistor 13 any appropriate fixed resistor can be used as resistor 13.
  • P is the value when all the PTC elements 11 are in the Low state.
  • P is the value when at least one PTC element 11 trips and goes high.
  • the threshold voltage V of the FET 15 is determined by various voltages such as the voltage across the rechargeable battery 1, the resistance of the resistor 13, the trip temperature of the PTC element 11, the resistance in the low and high states, and the number of the PTC elements 11. Force depending on factors, for example, about 0.8-2. OV.
  • a PTC element 17 for detecting an abnormal temperature may be added to the PTC element 11 for detecting an abnormal temperature, and a PTC element 17 for preventing overcurrent may be electrically connected in series between the secondary battery 1 and the application circuit 3.
  • the PTC element 17 is a force provided as being provided between the application circuit 3 and the drain of the FET 15. It is inserted in series!
  • the PTC element 17 for overcurrent prevention includes a PTC element having appropriate electric characteristics such that the reference temperature for determining whether the current flowing through the secondary battery 1 is an overcurrent corresponds to the trip temperature. Can be used.
  • the wiring 19 for electrical connection between the members may be a general wiring.
  • conductive materials such as copper, nickel, chromium, etc. may be used in any suitable form.
  • the gate circuit 11 when the secondary battery 1 is in a normal temperature state, for example, when the surface temperature of the secondary battery 1 is about ⁇ 20 to 70 ° C., all the PTC elements 11 are in a low state. Therefore, the resistance p, p, p,..., P force S of each PTC element 11 is smaller, and the resultant resistance P ( ⁇ p) thereof is also smaller. As a result, the gate
  • the source-to-source voltage V is relatively large, for example, the voltage V across the secondary battery is about 3V
  • Such a gate-source voltage V is, for example, about 0.8 1. Since the threshold voltage V is higher than 2V, the current between the source (S) and drain (D) of FET15 is th
  • the temperature of the PTC element 11 arranged in close contact with the secondary battery 1 also rises accordingly.
  • the state changes from the low state to the high state, and the resistance P of the PTC element 11 (however, m is an arbitrary natural number of 1-n), and the combined resistance P also increases rapidly.
  • the gate-source voltage V is extremely small, for example, the voltage V across the rechargeable battery is about
  • Such a gate-source voltage V is, for example,
  • the threshold voltage between the source (S) and drain (D) of FET15 is lower than the threshold voltage V as described above.
  • ONZOFF of the current flowing to the secondary battery 1 can be controlled according to the temperature of the secondary battery 1.
  • the temperature abnormality of the secondary battery 1 is detected by the PTC element 11, and the control function of the overheat prevention device 20 controls the electric power including the secondary battery 1.
  • the current flowing through the circuit can be cut off.
  • Such current interruption (OFF) is performed when at least one of the plurality of PTC elements detects an abnormal temperature of the secondary battery 1, and all PTC elements detect the abnormal temperature of the secondary battery 1. Since the current flows (ON) only when no detection is performed, overheating of the secondary battery can be effectively prevented. Therefore, even when the secondary battery 1 is in a locally overheated state, this can be quickly detected, and the safety of the electric circuit 10 including the secondary battery can be dramatically improved as compared with the related art.
  • the PTC element 17 also realizes the overcurrent prevention.
  • the current flowing through the secondary battery 1 becomes excessive due to some factor such as a failure of the application circuit 3, large Joule heat is generated in the PTC element 17.
  • the low state force also transitions to the high state, and the resistance of the PTC element 17 rapidly increases and the current flowing in the electric circuit including the secondary battery 1 decreases. Let it.
  • the PTC element 17 is in a thermal equilibrium state and maintains a high state to protect the electric circuit.
  • the factor that caused the overcurrent is removed and the temperature of the PTC element 17 drops below its trip temperature, it returns to a low state and the resistance of the PTC element 17 decreases rapidly, and the electric circuit including the secondary battery 1 Current returns to ON.
  • the overheat prevention device 20 of the present embodiment preferably includes such a PTC element 17 for preventing overcurrent, but is not essential to the implementation of the present invention.
  • an n-channel MOSFET may be used as a switching element, and a p-channel MOSFET may be used.
  • an electric circuit as shown in Fig. 3 can be applied.
  • the overheat prevention device 20 'shown in FIG. 3 uses the same components as those in FIG. 1 except that a p-channel MOSFET 15' is used instead of the n-channel MOSFET 15 in FIG.
  • parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the overheat prevention device 20 ′ shown in FIG. 3 performs the same function as the overheat prevention device 20 of the present embodiment in FIG.
  • the overheat prevention device and the electric device applied at the time of discharging the secondary battery have been described as one example of the present invention. However, based on the principle of the present invention, the device is applied at the time of charging. It will be understood by those skilled in the art that the overheating protection device and the electrical apparatus can be designed.
  • the overheating prevention device of the present invention can be suitably used for effectively preventing overheating of an electric device such as a secondary battery.

Abstract

L'invention concerne un dispositif de protection contre la surchauffe, qui permet d'empêcher efficacement la surchauffe d'accumulateurs. Un dispositif de protection contre la surchauffe (20) comprend une résistance variable (11), cette résistance changeant conformément aux températures, et un dispositif commutateur (15) permettant de commander le courant selon la tension appliquée. La résistance variable est thermiquement liée à une position déterminée d'un système électrique (1), et le dispositif commutateur (15) est conçu de telle façon qu'il commande le courant traversant le système électrique (1). Lorsque ladite position du système électrique (11) est chauffée à une température élevée, la résistance variable (11) modifie la tension appliquée au dispositif commutateur (15) pour couper le courant traversant le système électrique (1).
PCT/JP2004/016257 2003-11-07 2004-11-02 Dispositif de protection contre la surchauffe et systeme electrique pourvu de ce dispositif WO2005046017A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP04799460A EP1681753B1 (fr) 2003-11-07 2004-11-02 Dispositif de protection contre la surchauffe et systeme electrique pourvu de ce dispositif
JP2005515293A JPWO2005046017A1 (ja) 2003-11-07 2004-11-02 過熱防止デバイスおよびこれを備える電気装置
US10/578,380 US8174811B2 (en) 2003-11-07 2004-11-02 Overheat protection device and electrical system having same
KR1020067011121A KR101163797B1 (ko) 2003-11-07 2004-11-02 과열 방지 디바이스 및 이것을 구비하는 전기 장치
CN2004800328218A CN1879274B (zh) 2003-11-07 2004-11-02 防过热器件以及具备该器件的电气装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-378162 2003-11-07
JP2003378162 2003-11-07

Publications (1)

Publication Number Publication Date
WO2005046017A1 true WO2005046017A1 (fr) 2005-05-19

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US (1) US8174811B2 (fr)
EP (1) EP1681753B1 (fr)
JP (1) JPWO2005046017A1 (fr)
KR (1) KR101163797B1 (fr)
CN (1) CN1879274B (fr)
WO (1) WO2005046017A1 (fr)

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WO2007050109A1 (fr) * 2005-06-02 2007-05-03 Johnson Controls Technology Company Systeme de gestion de batterie au lithium
EP1811591A1 (fr) * 2006-01-20 2007-07-25 Torqeedo GmbH Batterie
US11031771B2 (en) * 2016-06-21 2021-06-08 Autonetworks Technologies, Ltd. Power supply control apparatus

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DE102004014136B4 (de) * 2004-03-23 2007-12-06 Siemens Ag Anordnung mit einer Batterie
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EP1681753B1 (fr) 2012-05-30
CN1879274B (zh) 2010-12-22
US20070210893A1 (en) 2007-09-13
CN1879274A (zh) 2006-12-13
KR20060124614A (ko) 2006-12-05
EP1681753A1 (fr) 2006-07-19
US8174811B2 (en) 2012-05-08
EP1681753A4 (fr) 2009-11-04
KR101163797B1 (ko) 2012-07-09
JPWO2005046017A1 (ja) 2007-05-24

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